195 citations · 1.7k across the 54 of their papers we have counts for
9 papers · 2 filters
Crossovers induced by discrete-time quantum walks
Kota Chisaki, Norio Konno, Etsuo Segawa +1
We consider crossovers with respect to the weak convergence theorems from a discrete-time quantum walk (DTQW). We show that a continuous-time quantum walk (CTQW) and discrete- and…
Survival probability in a one-dimensional quantum walk on a trapped lattice
Meltem Gonulol, Ekrem Aydiner, Yutaka Shikano +1
The dynamics of the survival probability of quantum walkers on a one-dimensional lattice with random distribution of absorbing immobile traps are investigated. The survival probabi…
The quantum mechanics of time travel through post-selected teleportation
Seth Lloyd, Lorenzo Maccone, Raul Garcia-Patron +2
This paper discusses the quantum mechanics of closed timelike curves (CTC) and of other potential methods for time travel. We analyze a specific proposal for such quantum time trav…
Estimation of Spin-Spin Interaction by Weak Measurement Scheme
Yutaka Shikano, Shu Tanaka
Precisely knowing an interaction Hamiltonian is crucial to realize quantum information tasks, especially to experimentally demonstrate a quantum computer and a quantum memory. We p…
Strange Weak Values
Akio Hosoya, Yutaka Shikano
We develop a formal theory of the weak values with emphasis on the consistency conditions and a probabilistic interpretation in the counter-factual processes. We present the condit…
Closed timelike curves via post-selection: theory and experimental demonstration
Seth Lloyd, Lorenzo Maccone, Raul Garcia-Patron +8
Closed timelike curves (CTCs) are trajectories in spacetime that effectively travel backwards in time: a test particle following a CTC can in principle interact with its former sel…
Localization and Fractality in Inhomogeneous Quantum Walks with Self-Duality
Yutaka Shikano, Hosho Katsura
We introduce and study a class of discrete-time quantum walks on a one-dimensional lattice. In contrast to the standard homogeneous quantum walks, coin operators are inhomogeneous…
Role of a Phase Factor in the Boundary Condition of a One-Dimensional Junction
Yoshiyuki Furuhashi, Masao Hirokawa, Kazumitsu Nakahara +1
One-dimensional quantum systems can be experimentally studied in recent nano-technology like the carbon nanotube and the nanowire. We have considered the mathematical model of the…
Emergence of Randomness and Arrow of Time in Quantum Walks
Yutaka Shikano, Kota Chisaki, Etsuo Segawa +1
Quantum walks are powerful tools not only to construct the quantum speedup algorithms but also to describe specific models in physical processes. Furthermore, the discrete time qua…